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Low-Power Organic Light Sensor Array Based on Active-Matrix Common-Gate Transimp
基于有机薄膜晶体管的低功耗柔性光传感器阵列成像系统
57.6μW功耗,4×5阵列,0-100μA检测范围,1kHz带宽
有机光传感器柔性电子跨阻放大器有机薄膜晶体管低功耗成像
▸创新点1:采用有机聚合物光敏材料,实现了低功耗和高灵敏度的光检测,适用于柔性电子设备(方法创新)。
▸创新点2:设计了自偏置和增益增强共栅两种TIA拓扑结构,分别提供41.3 dB的开环直流增益和±0.3%的非线性度(电路创新)。
▸创新点3:柔性塑料基板分离制造与集成技术,实现了光传感器与电子元件的独立制造和系统集成(系统创新)。
▸创新点4:系统在300 Hz频率下实现稳定的电流-电压转换(0–100 µA和2.0–3.7 V),并在1 kHz带宽内保持低非线性度(性能指标)。
Abstract
This article presents a 57.6- µW mechanically flex-
ible active-matrix imaging system based on a 4 × 5 array of
light sensors, each composed of a photodetector (PD) using a
light-sensitive organic polymer and a transimpedance ampli-
fier (TIA) based on organic thin-film transistors and integrated
thin-film carbon resistors. The PDs and the electronics are
fabricated on separate plastic films and integrated into a system.
Two different topologies for the TIA are designed, implemented,
and characterize